NTP users are strongly urged to take immediate action to ensure that their NTP daemons are not susceptible to being used in distributed denial-of-service (DDoS) attacks. Please also take this opportunity to defeat denial-of-service attacks by implementing Ingress and Egress filtering through BCP38.

ntp-4.2.8p13 was released on 07 March 2019. It addresses 1 medium-severity security issue in ntpd, and provides 17 non-security bugfixes and 1 other improvements over 4.2.8p12.

Welcome to the NTP Developers Web.

This is a web-based collaboration area for NTP Development related issues. Please feel free to add / modify / reorganize / recategorize as necessary to make this Web useful in the NTP development process.

For interactive development discussion, please visit the #ntp-dev channel on the Freenode IRC Network. Please use the NTP Pastebin instead of pasting large amounts of information (e.g. ntpq output, ntp.conf files) to the IRC channel.